Background & Aims: Constipation is Common complication gastrointestinal that have a significant impact on the health and quality of life. Using heat therapy is one of the proposed non-pharmaceutical interventions. The present study was conducted to determine the effect of abdominal local heat therapy on the state of defecation in patients fed through nasogastric tubes.

Materials & Methods: This study is a double blind clinical trial performed in 2015 to 8 months in the inner part of Qaem Hospital of Mashhad - Iran. In this study, 64 patients on nutrition through a nasogastric tube were randomly studied into two groups: placebo and experimental group. The patients in experimental group of local heat therapy with standard hot pack with the temperature 50 ° C on the abdomen for 23 minutes. In the placebo group, hot pack temperature was equal to the ambient temperature. Data were collected using a demographic questionnaire and a form containing records of the patients’ digestive function. Data were analyzed in SPSS 20.

Results: Defecation in the experimental group statistically had a significant difference before and after the intervention (p<0.05). But in the placebo group there was no significant difference in the state of defecation during the evaluation conducted at different stages.

Conclusion: The findings of this study show the effect of local Hyperthermia in improves on the state defecation and reduce constipation in patients being fed through nasogastric tube and it is suggested further studies to use it at the same time.